<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>
<body>
    <div id="app">
        <div v-if="isShow" style="background-color:#ccc;">我是v-if</div>
        <button @click="isShow=!isShow">显示 / 隐藏</button>
    </div>

    <script>
        var vm = new Vue({
            el:'#app',
            data:{
                isShow:true
            }
        })
    </script>
</body>
</html>